There's a scorpio that does the tracking thing. Its a cool option that came out after I bought mine. If you don't mind paying the subscription every month. One thing that did impress me about the scorpio is that fully charged it alerted me to someone walking near it, across 7 lanes of traffic, through a window and 3 walls, 1 flight up. (my office is in the center of a building on a concourse).
I'm not really worried where I park it at work. It's in plain sight, on a busy concourse and most of the public safety officers stationed in the lobbies, have bikes and keep an eye on it for me. The gun thing is difficult for me to pull off legally in nyc, but an icon titanium knuckle guard to the chops is an option.
